Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 165d95b9677cdd673b09dd7e5dcf18087189656a
      
https://github.com/WebKit/WebKit/commit/165d95b9677cdd673b09dd7e5dcf18087189656a
  Author: Nikolas Zimmermann <[email protected]>
  Date:   2026-06-22 (Mon, 22 Jun 2026)

  Changed paths:
    A 
LayoutTests/platform/glib/svg/transforms/nested-svg-transform-attribute-creates-layer-expected.txt
    A 
LayoutTests/svg/transforms/nested-svg-transform-attribute-creates-layer-expected.txt
    A 
LayoutTests/svg/transforms/nested-svg-transform-attribute-creates-layer.html
    M Source/WebCore/rendering/RenderLayerModelObject.cpp

  Log Message:
  -----------
  [LBSE] Broaden svgTransformAttributeChangeInducesLayerComposition() to 
isRenderSVGContainer()
https://bugs.webkit.org/show_bug.cgi?id=317575

Reviewed by Rob Buis.

svgTransformAttributeChangeInducesLayerComposition() only routed the
transform-attribute fast path through a style/layer recompute for
RenderSVGTransformableContainer, but missed RenderSVGViewportContainer.
(requiresLayer() returns true for isTransformed() and
Without the recompute the fast path took the non-layer transform
update instead, leaving requiresLayer() and hasLayer()
in disagreement and no layer created or destroyed.

Broaden the type check to isRenderSVGContainer(), which covers both <g>
and nested <svg> and adapt the assertion in
updateTransformAndRepaintForSVGAfterAttributeChange() in the same way.

Test: svg/transforms/nested-svg-transform-attribute-creates-layer.html

* 
LayoutTests/platform/glib/svg/transforms/nested-svg-transform-attribute-creates-layer-expected.txt:
 Added.
* 
LayoutTests/svg/transforms/nested-svg-transform-attribute-creates-layer-expected.txt:
 Added.
* LayoutTests/svg/transforms/nested-svg-transform-attribute-creates-layer.html: 
Added.
* Source/WebCore/rendering/RenderLayerModelObject.cpp:
(WebCore::RenderLayerModelObject::svgTransformAttributeChangeInducesLayerComposition):
(WebCore::RenderLayerModelObject::updateTransformAndRepaintForSVGAfterAttributeChange):

Canonical link: https://commits.webkit.org/315596@main



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